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by Gavinmc42
Mon Jul 06, 2020 12:08 pm
Forum: Graphics programming
Topic: 1000 Triangles on a Pi 4 at 60 fps - No Problem
Replies: 1
Views: 751

Re: 1000 Triangles on a Pi 4 at 60 fps - No Problem

Try the ipers mesa demo, I get 5290 polygons at 60fps.
https://github.com/freedesktop/mesa-dem ... /src/demos
Plenty of demos there to play with.

I have wanted to try graphics with D, tried most of the others, never tried C#.
Python is pretty handy to swap between PC and Pi's
by Gavinmc42
Mon Jul 06, 2020 11:36 am
Forum: Camera board
Topic: diy autofocus with /dev/video16 and stepper motor?
Replies: 26
Views: 1757

Re: diy autofocus with /dev/video16 and stepper motor?

I have used toothed belts inside out on flat pulleys.
Spring loaded tension pulley.
But these were on ball bearing shafts.

Perhaps some sort of torque control on the stepper.
Good stepper motor drivers have adjustable current limits.
by Gavinmc42
Mon Jul 06, 2020 11:31 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 2080

Re: FPGA Development Software for RPI 4?

I meant DRAM like, as in addressable memory array. Don't remember the exact article, it was months ago, pre lockdown, which is a different universe now. https://www.nature.com/articles/s41377-019-0151-0 https://onlinelibrary.wiley.com/doi/full/10.1002/admt.201900037 https://www.intechopen.com/books/...
by Gavinmc42
Mon Jul 06, 2020 6:53 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 2080

Re: FPGA Development Software for RPI 4?

NN done with NVM like a dram chip are starting to appear.
Imagine if it can be stacked onto a Dram die.

Buy a dram chip with NN.
Micron have the 3D X-point tech.
by Gavinmc42
Mon Jul 06, 2020 2:25 am
Forum: Camera board
Topic: diy autofocus with /dev/video16 and stepper motor?
Replies: 26
Views: 1757

Re: diy autofocus with /dev/video16 and stepper motor?

If you keep the lighting controlled and autowhite balance etc off then the maximum jpeg file size is when the lens is at the focus point.
Made a jig to do this for a security camera production line more than a decade ago.
Very sensitive to stray light changes so a sealed box helps.
by Gavinmc42
Mon Jul 06, 2020 2:16 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 2080

Re: FPGA Development Software for RPI 4?

I watch Lex Fridman, he had some Tesla autopilot guys. The Tesla autopilot hardware is probably the closest to real world there is. It has CPUs, GPUs and NNs. The coding is getting better, going from CPU to GPU to NN. They can do this because they collect all the data for training. They have a train...
by Gavinmc42
Sun Jul 05, 2020 11:09 am
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 532
Views: 150914

Re: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)

Sound is working on analog with DVI outputs. Might have been fixed with the genup I did yesterday? There is now a drop down selection option in the volume mixer, selecting the analog headphone works. Autodetect is not working? Probably just me getting used to the 4.19 to 5.4 changes :oops: Now have ...
by Gavinmc42
Sun Jul 05, 2020 9:03 am
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 532
Views: 150914

Re: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)

Got Vulkan 64bit working on Raspberry Pi OS ;) https://www.raspberrypi.org/forums/viewtopic.php?f=67&t=277125&p=1690769#p1690769 Will try it in Gentoo64. Got a suspicion about the audio from testing on Raspberry Pi OS. When HDMI monitor is plugged in, three channels are set in amixer - HDMI1, HDMI2,...
by Gavinmc42
Sun Jul 05, 2020 7:27 am
Forum: Advanced users
Topic: Is there a rapid shutdown?
Replies: 3
Views: 262

Re: Is there a rapid shutdown?

I use PiCore Linux.
Runs from ram, only writes when you tell it to.
I can even take the SD card out while it is running without problems.
by Gavinmc42
Sun Jul 05, 2020 7:23 am
Forum: General discussion
Topic: I cannot install ROS kinetic in RPI4, Did somebody get it?
Replies: 17
Views: 3897

Re: I cannot install ROS kinetic in RPI4, Did somebody get it?

Well done.
One more thing that can be ticked off the list of things to check on Pi4's.

You might want to have a look at the new OpenVX, saw it in the Pi blog.
OpenCV scares me, like ROS it is big and takes a lot of learning ;)
by Gavinmc42
Sun Jul 05, 2020 7:17 am
Forum: Graphics programming
Topic: Script to build development Vulkan driver and demos
Replies: 26
Views: 2481

Re: Script to build development Vulkan driver and demos

Linux raspberrypi 5.4.47-v8+ #1322 SMP PREEMPT Wed Jun 17 18:05:46 BST 2020 aarch64 GNU/Linux Did not delete mesa, just renamed them and then git the new one. I end up with a "broadcom_icd.aarch64.json" file and change the path to that name. Could have missed another needed change for 64bit? EDIT- ...
by Gavinmc42
Sun Jul 05, 2020 7:00 am
Forum: Gentoo
Topic: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)
Replies: 532
Views: 150914

Re: Updated 64-bit Gentoo Image for RPi3 Released (now also for RPi3B+ and RPi4B)

Sakaki, porthole seems to have disappeared, I generally use it to find out were software and libs are hiding before doing CLI emerge.

Still having audio issue when using HDMI to a DVI monitor and audio out the analog jack to amplified speakers. No sounds.
HDMI sound is fine on a TV.
by Gavinmc42
Sun Jul 05, 2020 6:53 am
Forum: General discussion
Topic: STICKY: Raspberry Pi OS (64 bit) beta test version feedback
Replies: 346
Views: 63988

Re: STICKY: Raspberry Pi OS (64 bit) beta test version feedback

Chromium 83 is extremely painful to use, I had no problem with 80.
Is there a way to roll back with apt-get update?
by Gavinmc42
Sun Jul 05, 2020 6:50 am
Forum: General discussion
Topic: FPGA Development Software for RPI 4?
Replies: 64
Views: 2080

Re: FPGA Development Software for RPI 4?

Just FWIW, I'm working on a Linguistic AI project that I'm writing in Python using CODE-OSS on a Raspberry Pi. I'm also using eSpeak as the voice and CMU PocketSphinx as the speech recognition engine. In addition to that I'm learning about perceptrons which I'm also programming in Python. My ultima...
by Gavinmc42
Sun Jul 05, 2020 12:32 am
Forum: Graphics programming
Topic: Script to build development Vulkan driver and demos
Replies: 26
Views: 2481

Re: Script to build development Vulkan driver and demos

pi@raspberrypi:~/sascha-willems/build/bin $ ./gears
Could not create Vulkan instance :
ERROR_INITIALIZATION_FAILED
Same issue. Path? Must have missed a step
Everything compiles fine.
by Gavinmc42
Sun Jul 05, 2020 12:05 am
Forum: Gaming
Topic: Warzone2100
Replies: 3
Views: 276

Re: Warzone2100

Got it to work on Gentoo64 :D Sakaki also keeps Gentoo64 ahead of the more stable Raspberry Pi OS which is based on Debian. Only needed three dependencies as Gentoo64 usually has more stuff install by default than Raspberry Pi OS. I am growing to like the AR mod, I can zoom in closer and see more de...
by Gavinmc42
Sat Jul 04, 2020 11:52 pm
Forum: Beginners
Topic: Purchasing a RPi: How much GB RAM would I need?
Replies: 6
Views: 433

Re: Purchasing a RPi: How much GB RAM would I need?

The 4GB has been able to handle everything I have throw at it. The 2GB can do almost as much, the 1GB is more for single applications only. 8GB if you want a Desktop and video editing. Get the 4GB to start with? OpenVX just got released for Pi's, might be a good place to start. See the Blog post. Yo...
by Gavinmc42
Sat Jul 04, 2020 11:47 pm
Forum: Gaming
Topic: FlightGear & Pi4
Replies: 40
Views: 6294

Re: FlightGear & Pi4

Now to try Vulkan on my 64bit OS :D https://www.raspberrypi.org/forums/viewtopic.php?f=67&t=277125 The main advantage I see with Vulkan is the ability to use the 4 ARM cores. Each one of those core has NEON. Hopefully that is enough performance boost to do FHD at a decent framerate. 4K is a bit wish...
by Gavinmc42
Sat Jul 04, 2020 12:47 am
Forum: General discussion
Topic: STICKY: Raspberry Pi OS (64 bit) beta test version feedback
Replies: 346
Views: 63988

Re: STICKY: Raspberry Pi OS (64 bit) beta test version feedback

Chromium 83 sucks for browsing and YT's, 80 was much better.
Time to go back to Gentoo64 until it gets fixed.
by Gavinmc42
Fri Jul 03, 2020 1:32 am
Forum: Off topic discussion
Topic: Tongue so far into cheek...
Replies: 28
Views: 2396

Re: Tongue so far into cheek...

Another complicated question is whether we are individuals, we are entirely reactionary and totally dependent upon things outside ourselves - so really we all act as one, it just depends on where the viewpoint is. That really complicates the AI concept because clearly it is automatically part of th...
by Gavinmc42
Thu Jul 02, 2020 2:04 pm
Forum: Gaming
Topic: Warzone2100
Replies: 3
Views: 276

Re: Warzone2100

I figured out how to put the Art Revolution mod on (read the wiki) :lol: Played a short time on one map and saved it for tomorrow, er later today :lol: Just read all 56 pages of the Art Rev story, very impressed. http://forums.wz2100.net/viewtopic.php?f=33&t=4245&start=825 The window size seems to g...
by Gavinmc42
Thu Jul 02, 2020 9:02 am
Forum: Off topic discussion
Topic: "Distance Learning" on a Pi?
Replies: 19
Views: 3056

Re: "Distance Learning" on a Pi?

Jitsi rang a bell
viewtopic.php?f=54&t=276308

It comes easy to install on the latest 1.60 release of Gentoo64?
viewtopic.php?p=1685177#p1685177
by Gavinmc42
Thu Jul 02, 2020 8:42 am
Forum: Gaming
Topic: Warzone2100
Replies: 3
Views: 276

Warzone2100

There is a new version of Warzone2100 and in this version the graphics work :D Previous 3.2, 3.3 versions worked on Gentoo64, so the bug was Raspbian related, tlll now. A Vulkan 1.1 version is getting closer too? https://wz2100.net/news/ Alpha/Beta Pi drivers are only Vulkan 1.0, so not yet ready to...
by Gavinmc42
Thu Jul 02, 2020 12:04 am
Forum: Gaming
Topic: FlightGear & Pi4
Replies: 40
Views: 6294

Re: FlightGear & Pi4

Looks pretty good. Have not tried FG for a while. Wondering now if a bit more performance can be tweaked by going to Vulkan soon? https://vsg-dev.github.io/VulkanSceneGraph/ https://github.com/vsg-dev [[ 67%] Building CXX object src/vsg/CMakeFiles/vsg.dir/viewer/Trackball.cpp.o /home/pi/VulkanSceneG...
by Gavinmc42
Wed Jul 01, 2020 1:17 pm
Forum: General discussion
Topic: own PCB design based on Raspberry Pi 4 schematic
Replies: 7
Views: 442

Re: own PCB design based on Raspberry Pi 4 schematic

I usually just design boards that plug onto the GPIO header, daughter boards(Hats). Or a bigger board where the Pi is turned over and plugged onto, motherboards. Everything its much easier that way. You can use the Compute boards, but I have never bothered. Zeros with baremetal code are pretty small...

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